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NVD / CVE Program· CNA Linux

CVE-2025-68362: wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 118e12bf3e4288cf845cd3759bd9d4c99f91aab5, 4758770a673c60d8f615809304d72e1432fa6355, 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1.

Low priority for now. Upgrade to Linux Linux 118e12bf3e4288cf845cd3759bd9d4c99f91aab5, 4758770a673c60d8f615809304d72e1432fa6355, 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb() The rtl8187_rx_cb() calculates the rx descriptor header address by subtracting its size from the skb tail pointer. However, it does not validate if the received packet (skb->len from urb->actual_length) is large enough to contain this header. If a truncated packet is received, this will lead to a buffer underflow, reading memory before the start of the skb data area, and causing a kernel panic. Add length checks for both rtl8187 and rtl8187b descriptor headers before attempting to access them, dropping the packet cleanly if the check fails.

—No exploit Fix available
Published
Dec 24, 2025
Updated
Oct 13, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.27affected
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before 118e12bf3e4288cf845cd3759bd9d4c99f91aab5affected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before 6a96bd0d94305fd04a6ac64446ec113bae289384affected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before e2f3ea15e804607e0a4a34a2f6c331c8750b68bcaffected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before dc153401fb26c1640a2b279c47b65e1c416af276affected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before 4758770a673c60d8f615809304d72e1432fa6355affected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before 638d4148e166d114a4cd7becaae992ce1a815ed8affected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15affected · git
    • 6f7853f3cbe457067e9fe05461f56c7ea4ac488c and later · before b647d2574e4583c2e3b0ab35568f60c88e910840affected · git
    • before 2.6.27not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.13-16.17.13-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-68360Dec 24, 2025 · wifi: mt76: wed: use proper wed reference in mt76 wed driver callabacks
    32Monitor
  • ← EarlierCVE-2025-68361Dec 24, 2025 · erofs: limit the level of fs stacking for file-backed mounts
    0Monitor
  • Later →CVE-2025-68363Dec 24, 2025 · bpf: Check skb->transport_header is set in bpf_skb_check_mtu
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux118e12bf3e4288cf845cd3759bd9d4c99f91aab5Vendor (CNA)
Linux Linux4758770a673c60d8f615809304d72e1432fa6355Vendor (CNA)
Linux Linux5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15Vendor (CNA)
Linux Linux638d4148e166d114a4cd7becaae992ce1a815ed8Vendor (CNA)
Linux Linux6a96bd0d94305fd04a6ac64446ec113bae289384Vendor (CNA)
Linux Linuxb647d2574e4583c2e3b0ab35568f60c88e910840Vendor (CNA)
Linux Linuxdc153401fb26c1640a2b279c47b65e1c416af276Vendor (CNA)
Linux Linuxe2f3ea15e804607e0a4a34a2f6c331c8750b68bcVendor (CNA)
azl3 kernel 6.6.119.3-3 on Azure Linux 3.06.6.121.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records